| Timestamper | A timestamping service which conforms to the Time-Stamp Protocol (TSP) defined in: RFC 3161. |
| HttpTimestamper | A timestamper that communicates with a Timestamping Authority (TSA) over HTTP. |
| TimestampToken | This class provides the timestamp token info resulting from a successful timestamp request, as defined in RFC 3161. |
| TSRequest | This class provides a timestamp request, as defined in RFC 3161. |
| TSResponse | This class provides the response corresponding to a timestamp request, as defined in RFC 3161. |